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Node Jimp | scale

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The scale() function is an inbuilt function in Nodejs | Jimp that uniformly scales the image by a factor.

Syntax: 

scale(scale, mode, cb)

Parameter: 

  • scale: This parameter stores the scaling factor of the image.
  • mode: This is an optional parameter that stores the scaling method.
  • cb: This is an optional parameter that is invoked when compilation is complete.

Input Images: 

Setup Environment: 

npm init -y

Install Dependencies:

npm install jimp 

Example 1: In this example, we will see the use of scale.

javascript




// npm install --save jimp
// import jimp library to the environment
const Jimp = require('jimp');
 
// User-Defined Function to read the images
async function main() {
    const image = await Jimp.read('
        // scale Function having scaling factor as 0.2
        image.scale(.2)
            .write('scale1.png');
}
 
main();
console.log('Image Processing Completed');


Output: 

Example 2: With mode and cb (optional parameters)  

javascript




// npm install --save jimp
// import jimp library to the environment
const Jimp = require('jimp');
 
// User-Defined Function to read the images
async function main() {
    const image = await Jimp.read('
        // scale Function having scaling-factor, mode and callback function
        image.scale(3, Jimp.RESIZE_BEZIER, function (err) {
            if (err) throw err;
        })
            .write('scale2.png');
}
 
main();
console.log('Image Processing Completed');


Output: 
 


Reference: https://www.npmjs.com/package/jimp



Last Updated : 27 Mar, 2023
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